:root{color-scheme:light;--ink:#203c37;--muted:#68756d;--paper:#f5f4ed;--line:#d9ded3}*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif}main{max-width:510px;margin:auto;padding:27px 22px max(28px,env(safe-area-inset-bottom))}button,a{-webkit-tap-highlight-color:transparent}button{font:inherit;cursor:pointer;color:inherit;border:0}button:focus-visible,a:focus-visible,summary:focus-visible{outline:3px solid #bc8535;outline-offset:4px}header{display:flex;align-items:center;justify-content:space-between}.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:inherit;font-size:15px;letter-spacing:3px;font-weight:750}.brand small{display:block;font-size:8px;letter-spacing:1.7px;margin-top:4px}.seal{display:inline-grid;place-items:center;width:42px;height:42px;border:1px solid #aebbad;border-radius:50%;font-size:26px}.icon{width:35px;height:35px;background:transparent;border:1px solid var(--line);border-radius:50%;font-family:Georgia,serif}.intro{padding:32px 0 22px}.eyebrow{font-size:10px;font-weight:700;letter-spacing:1.7px;color:var(--muted)}h1{font-family:Georgia,serif;font-size:36px;line-height:1.12;font-weight:400;letter-spacing:-1px;margin:10px 0 13px}.intro p{font-size:13px;color:var(--muted);margin:0}nav{display:flex;padding:4px;background:#e7eadf;border-radius:12px;gap:4px}nav button{flex:1;background:none;border-radius:9px;min-height:43px;font-size:13px}nav button[aria-pressed=true]{background:var(--ink);color:white;box-shadow:0 2px 5px #203c3720}nav span{opacity:.7;margin-left:4px}.progress-label{display:flex;justify-content:space-between;font-size:11px;color:var(--muted);margin:22px 0 9px}.track{height:3px;background:#dfe4d9;border-radius:3px;margin-bottom:17px;overflow:hidden}#bar{height:100%;background:#587e69;transition:width .2s}.card{display:flex;flex-direction:column;text-align:left;width:100%;min-height:300px;padding:25px 25px 20px;background:#fffef9;border:1px solid #d6dccd;border-radius:18px;box-shadow:0 7px 0 -3px #e5e8dc,0 18px 30px #203c3708;touch-action:manipulation}h2{font-family:Georgia,serif;font-size:27px;line-height:1.28;font-weight:400;margin:22px 0 25px}.tap{margin-top:auto;padding-top:24px;display:flex;justify-content:space-between;font-size:12px;color:var(--muted);width:100%}.tap span{font-size:20px}#answer{border-top:1px solid var(--line);padding-top:20px;width:100%}#answerHint{letter-spacing:1px;color:#56734f}ul{padding-left:20px;margin:14px 0 0}li{font-size:19px;line-height:1.5;margin-bottom:6px}.grading{display:flex;gap:10px;margin-top:22px}.grading button{flex:1;min-height:49px;border:1px solid #c7cfc1;border-radius:11px;background:transparent;font-size:14px}#known{background:var(--ink);color:#fff;border-color:var(--ink)}.navigation{display:flex;justify-content:space-between;margin-top:20px}.navigation button{padding:10px 0;background:transparent;font-size:14px}button:disabled{opacity:.3;cursor:default}footer{text-align:center;margin-top:20px}footer button{background:none;font-size:12px;text-decoration:underline;text-underline-offset:4px}footer p{font-size:10px;color:var(--muted);margin:16px 0 25px}details{border-top:1px solid var(--line);padding-top:17px;font-size:12px;color:var(--muted);line-height:1.6}summary{cursor:pointer}details a{color:var(--ink)}.finished{padding:35px 15px;text-align:center}.finished h2{margin:20px 0 10px}.finished p{font-size:14px;line-height:1.5}.finished button{display:block;width:100%;min-height:48px;margin:12px 0;background:#e5e9dd;border-radius:10px}.finished .primary{background:var(--ink);color:white}[hidden]{display:none!important}@media(max-width:360px){main{padding:20px 16px}h1{font-size:32px}.card{padding:21px}h2{font-size:24px}}@media(prefers-reduced-motion:reduce){*{transition:none!important}}

/* Large, explicit controls for easy phone use. */
main{max-width:560px;padding:18px 16px 30px}.brand small{display:none}.brand{font-size:18px}.seal{width:34px;height:34px;font-size:22px}.icon{width:44px;height:44px;font-size:22px}.intro{padding:18px 0}h1{font-family:inherit;font-size:29px;font-weight:750;letter-spacing:-.7px;margin:0 0 10px}.intro p{font-size:18px;line-height:1.4;color:var(--ink)}.instructions{margin-top:12px;padding:12px;background:#e5ecdf;border-radius:12px;font-size:16px;line-height:1.8}.instructions strong{margin-right:5px}nav button{font-size:16px;min-height:52px;font-weight:650}.progress-label{font-size:16px;margin:16px 0 9px;font-weight:650}.progress-label #modeLabel{display:none}.progress-label #counter{width:100%;text-align:center}.card{min-height:220px;padding:22px;box-shadow:0 4px 0 -1px #dce3d3}.card .eyebrow{font-size:11px;letter-spacing:1px}h2{font-family:inherit;font-size:29px;line-height:1.25;font-weight:700;margin:17px 0 20px}.tap{display:none}.reveal{display:block;width:100%;min-height:62px;border-radius:12px;background:#fff;color:#203c37;border:2px solid #203c37;font-size:22px;font-weight:800;margin-top:18px}.step-hint{text-align:center;font-size:16px;line-height:1.4;margin:12px 0;color:#43544a}.navigation{display:grid;grid-template-columns:1fr 1.25fr;gap:12px;margin-top:14px}.navigation button{min-height:75px;padding:12px 7px;border-radius:12px;font-size:18px;font-weight:800;line-height:1.4;border:2px solid #b6c6b1;background:#e7ecdf}.navigation #next{background:#203c37;color:white;border-color:#203c37}.grading{gap:10px;margin-top:14px}.grading button{min-height:52px;font-size:15px;font-weight:600;padding:8px;background:#f3f0df}#known{background:#e5ecdf;color:#203c37;border-color:#b6c6b1}li{font-size:25px;line-height:1.4;font-weight:650}#answer{padding-top:16px}#alternatives{font-size:16px;margin-top:20px}#alternatives li{font-size:18px;font-weight:400}footer{margin-top:25px}footer button{font-size:16px;padding:14px}footer p{font-size:14px;line-height:1.5}details{font-size:15px}.finished button{font-size:18px;min-height:60px}@media(max-width:360px){h1{font-size:26px}h2{font-size:26px}.instructions{font-size:15px}.navigation button{font-size:16px}}

main{padding-bottom:140px}.navigation{position:fixed;bottom:0;left:50%;transform:translateX(-50%);width:calc(100% - 32px);max-width:528px;background:#f5f4ed;padding:12px 0 max(12px,env(safe-area-inset-bottom));z-index:10;box-shadow:0 -8px 16px #f5f4ed;border-top:1px solid #d9ded3}.navigation button{min-height:68px}